LM4128BMFX-3.3

Voltage Reference Overview

The LM4128BMFX-3.3 is a precision micropower series voltage reference manufactured by Texas Instruments, housed in a surface-mount SOT-23-5 package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.2%. The device operates within a temperature range of -40°C to +125°C and features a maximum shunt current of 20 mA. It supports a maximum input voltage of 6 V and exhibits a temperature coefficient of 75 ppm/°C.

Voltage Reference Feature Summary

• Delivers high-precision voltage regulation with tight initial accuracy tolerances for sensitive analog circuits.
• Operates at micropower levels, minimizing energy consumption in battery-powered or portable applications.
• Utilizes a compact SOT-23-5 surface-mount footprint to facilitate space-constrained PCB layouts.

Voltage Reference Applications

• Precision data acquisition systems requiring stable reference voltages
• Portable instrumentation powered by limited energy sources
• Analog-to-digital converter (ADC) reference inputs

Voltage Reference Procurement Notes

Verify the specific suffix 'BMFX' against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the ordering code matches the required tolerance and packaging format. Cross-reference the RoHS status and lead-free designation if environmental compliance is mandatory for your assembly process.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference is required with high initial accuracy. Consider the 75 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 20 mA shunt current capability meets the load demands of the connected circuitry without exceeding the maximum power dissipation limits.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades, designed for applications demanding low noise and high stability in small form factors.

Voltage Reference Replacement Considerations

LM4128BMF-3.3/NOPB: Direct equivalent with identical electrical characteristics and pinout configuration.

Voltage Reference FAQ

What is the maximum operating temperature for the LM4128BMFX-3.3?

The maximum operating temperature is +125°C.

Does the LM4128BMFX-3.3 support adjustable output voltages?

No, it is a fixed-output series voltage reference providing a nominal 3.3 V output.